branch master updated (ce646af -> c596a1c)

[Christopher Baines]

cbaines pushed a change to branch master
in repository data-service.

    from ce646af  Tweak inputs in guix-dev.scm
     new a0cd109  Add guile-prometheus to guix-dev.scm
     new c596a1c  Add a Prometheus metrics page, with some database metrics

The 2 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.


Summary of changes:
 Makefile.am                          |  1 +
 guix-data-service/metrics.scm        | 79 ++++++++++++++++++++++++++++++++++++
 guix-data-service/web/controller.scm | 44 ++++++++++++++++++++
 guix-dev.scm                         | 27 ++++++++++++
 4 files changed, 151 insertions(+)
 create mode 100644 guix-data-service/metrics.scm